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D. D. -ORIVISB Y AND C. H. LDGUE.

GEAR LAPPING MACHINE.

APPLICATION FILED JAN. I9. I916.

1,304,699. Patented May 27, 1919 4 SHEETS-SHEET I.

I N VEN TORS immwwwwgf a/ A TTORNEYS.

D. D. ORMSBY AND C. H. LOGUE.

GEAR LAPPING MACHiNE.

APPLICATION FILED JAN. I9, 1916.

Patented May 27, 1919.

4 SHEETS-SHEET 2.

v INVENTORS.

Maw/5W A TTORNEYS.

D. D. ORMSBY AND C. H. LOGUE.

GEAR LAPPING MACHINE.

APPLICAUON FILED JAN.19. 1916.

1,804,699. 7 Patented May 27, 1919.

4 SHEETS-SHEET 3.

IN VEN TORS )MIBWMMb K A TTORNEYS.

D. D. ORIVISBY AND C. H. LOGUE.

GEAR LAPPING MACHINE.

APPLICATION FILED JAN. 10. 19x15.

Patented May 27, 1919.

4 SHEETS--SHEET 4.

Q N Y RN B an '71.. ,1! TILVVONYX M $H 11111 4% EN MN 18? MN MN A TTORNEYS.

UNITED STATES PATENT oru cn.

DONALD D. ORMSBY AND CHARLES H. LOG-U3, OF SYRACUSE, NEW YORK, ASSIGNORS TO BROWN-LIPE-CHAPIN 00., OF SYRACUSE, YORK, A CORPORATION OF NEW YORK.

GEAR-LAPPING macamn.

, Specification of Letters Patent.

Patented May T27, 1919.

Application filed January 19, 1916. Serial No. 72,999.

To all whom it may concern:

Be it known that we, DONALD D. ORMSBY chine is particularly simple in construction and highly eflicient, durable, rapid and accurate in use; and the invention consists in the combinations andconstructions hereinafter set forth, and claimed.

had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a plan view, partly in section, of one embodiment of, a machine embodying our invention.

Fig. 2 is an elevation. partly broken away of the machine shown in Fig. 1, the oscillation of parts thereof being indicated in 80 dotted lines.

Fig. 3 is an elevation, partly in section and partly broken away, looking upwardly in Fig. 4 is a sectional view, parts being 85 omitted, taken on the plane of line 4-4 Fig. 1, looking to the left.

Fig. 5 is afplan' view of the hand wheel and contiguous parts shown in Fig. 4.

This gear lapping machine comprises generally, means for supporting and rota-ting the gears while in mesh and means for moving the support for one of the gears to carry said gear toward and from the other gear and bring them into full mesh and partly out of mesh during the rotation of the gears, to correct the generating of the conjugate curves of the teeth of the gears.-

The machine here illustrated comprises a carriage having a rotating support for one gear, a carriage having a rotating support for the second gear arranged to hold the second gear in mesh with the first gear, the

In describing this invention, reference is carriage being movable back and forth to I carry the second gear toward and from the first gear during the rotation of the gears.

The illustrated form of our machine is for working in two bevel gears, and the car-- riage for the second gear is mounted to oscillate about an axis intersecting the axis of the rotating support of the first gear, and the support of the second gear is arranged with its axis radially relativelyto the axes of the support for the first gear and the oscillating carriage. In other words, the axis I of the oscillating carriage is arranged ina line which intersects the apex of thepitch cones of the two gears, it bein understood that for the proper running 0 bevel gears the apices ofthe pitch cones of the two gears are nearly or substantially coincident.

Preferably in order that the machine may be adjusted to different sizes of gears, the

rotating supports for the gears are adjustable axially.

1 designates the support for one gear which is here shown as a head having a face plate 2 to which the gear 3 is secured, the head being mounted upon a rotating shaft or spindle 1 journaled in a suitable bearing 5 supported by a carriage 6 movable in suitable guides along the main frame or bed 7.

8 is the oscillating carriage, said carriage being pivoted at 9 to the frame or bed 7 with its axis. intersecting at a right angle, the axis of the shaft 4 andgear supporting carriage 1.

10'is a support for the second gear 11, said support being a shaft suitably fixed in a rotatable sleeve 12 journaled in suitable bearings 13 supported, as hereinafter described, and the'shaft being arranged eccentric to the axis 9. of the carriage 8 and radially relatively to the axis of the gear support 1.and its shaft 4, the arrangement of the supports-1 and 8 being such that the axialline of the carriage 8 intersects the 11. The bearmgs 13 for the sleeve 12 and the shaft 10- are supported by brackets 1e projecting from a carriage 15 adjustable along a suitable guide 16 provided on the oscillating carriage 8, and extending radially relatively to the axis 9 of the carriage 8..

The carriage 15 is adjustable along its guide by means of clam-ping members 20.

The carriage 6 which carries the spindle 4 supporting the gear 3 is also adjustable to] shift the gear 3 axially, it being movablealong the bed 7 by means of an adjusting screw 21, Fig. 3 similar to the screw 17. The gears are rotated by power applied to one of the shafts 4 or 10, and the carriage 8 is oscillated by power transmitting connections between one of these shafts and the carriage 8.

In this embodiment of our invention, the sleeve 12 which encircles and rotates with the shaft 10 is pi'ovided with a ulley 22 thereon between .the ends thereo and between the bearings 13, by means of which pulley power can be applied to the shaft 10 through a suitable belt. The motion is transmitted to'the gear 3 and its support 1 and spindle 4; and the carriage 8 is actuated by power transmitting connections interposed between the shaft 4, and said carriage 8.

The power transmitting connections here illustrated include a worm 23, Fig. 1, mounted on the spindle 4, a worm gear 24, Figs. 1 and 3, meshing with the worm 23, a shaft 25 extending crosswise of the shaft 4 and upon which the spiral gear 24 is mounted, eccentric means mounted on the shaft 25 including a disk 26 having an eccentric pin 27 on which is mounted a suitable block or bearing 28, a. rock arm or link 29 having a slot 30 in which the block 28 slides, a rock shaft 31 parallel with the shaft 25 and upon one end of which the rock arm 29 is mounted, a rock arm 32 mounted on the other end of the rock shaft 31, and a link 33 connected at one end of the rock arm 32 and its other end to the carriage 8.

The shafts 25 and 31 are supported in suitable bearings 34 and 35 provided on the carriage 6. The amount of throw or the movement of the rock shaft 31 and its arm 32 can be adjusted by moving the eccentric block 28 radially relatively to the disk 26, this adjustment being effected in any suitable manner as by a screw 36, Fig. 3, extending radially of the disk 26 or the guide way in which the block 28 slides. The angle of the rock arm 29 relatively to the rock shaft 31 may be varied to conform to the adjustment of the eccentric pin 27 and the block 28, by loosening a locking device 37 on the shaft 31, which device locks the rock arm 29 to the shaft 31, and turning the rock shaft 31 relatively to the rock arm 29 to conform to the new position of the eccentric 27 and tightening the device 37, it being necessary nee-aces to disconnect the rock arm 32 or. the link 33 from the carriage 8 during such turning of the'rock shaft.

A casing 38 incloses the parts 26, 29, 37

- and contiguous parts, this casing being removed in Fig. 1.

The link 33 is connected to the carriage '3 by means of-a movable pivot pin 39, Figs. 1 and 3 which is connected to a locking" bolt 40 so that the pivot pin 39 can only be removed and replaced (as before and after the 42 formed in the .carriage 6. The passage 41 and socket 42 are in alinement when the carriage 8 is in its starting position, that is, its central position in which it supports the bevel gear orpinion 11 so that theaxial line of said gear is at a right angle to the axis of the other bevel 3 when thegears are in normal meshing relation and the apices of the pitch cones of the gears are coincident. The pivot pin 39 and locking pin 40 are connected together by a rocking arm or lever 43 pivoted at 44 between its ends to lugs 45 projecting from the carriage 8 and at its opposite ends at 46, 47 to the pins, 39, 40, respectively. Hence, the pivot pin 39 cannot be removed unless the carriage 8 is moved into such position that the passage 41 is alined with the socket 42. Therefore before an adjustment of the eccentric bearing block 28 or the rock arm 32 can be effected, it is necessary to lock the carriage 8 in its starting or central position, and before the pivot pin 39 can be replaced it is necessary that the carriage 8 be moved to its starting position if in the meantime it has been moved out of such position. Hence, after an adjustment of the eccentric bearing block 28 has been made, it is necessary to rotate the shaft 25 by hand in order to position the eccentric in such angular relation that it will operate to move the carriage equal distances to the right and the left of its central position;

' The link 33 is composed of two sections 48, 49 with a buffer spring between them, the section 48 being a barrel, the section 49 being a rod extending into the barrel, and the spring50 being compressible between a head 51 on the inner end of the rod and a plug 52 closing the end of the barrel and through which plug the rod extends. The

- barrel is provided with a bearing 53 pivoted at 54 to the rock arm 32, and the rod 49 ex tends into the socket or bearing 55 pivoted at 56 on the pin 39.

A suitable pulley 57 and drum 58 are provided on the shaft 4 for connection respectively with an oil pump, and a brake for placing a load. on the gears.

I In operation, the bevel gears are placed upon their" respective supports 1 and 10,

' these parts having been adjusted axially to conform to the sizes of the gears to be lapped or fworked in. The throw of the eccentric 27 and the rockarm 32 are adjusted properly to move the'carriage 8 so that the gear or pinion 11 on the spindle will be moved laterally inwardly toward the gear on the support 1, tomesh the teeth beyond their normal meshing relation, that is,.beyond the pitch line, and outwardly beyond their normal pitch line but not entirely out of mesh. Power is'then applied to the pulley 22 and this power is transferred through the gears 11 to the carriage or support 1, shaft 4, through the worm 23, spiral gear 24 and parts connected thereto, to the carriage 8. If necessary abrading material as emery dust may be. applied to the gears 11 and 3 on the supports but in most cases it is not necessaryto use abrading material.

Owing to the oscillating movement of the carriage-8 and the rotation of the gears 11 and 3 thereof, the working in or the correcting of the conjugate curves of any two gears that are to run together, is quickly accomplished, so that they work substantially noiselessly, the average time for each set of gears being less than thirty seconds.

What we claim is:

1. A gear lapping machine comprising a rotating support for one gear, an oscillating carriage having a rotating support for a second gear located eccentric to its axis of oscillation, means for rotating one of the supports, and means for oscillating the carriage during the rotation of the supports, substantially as and for the purpose specified. 2. A gear lapping machine comprising a rotating support for one gear, an oscillating carriage having a rotating support for a second gear, means for rotating one of the supports, and means for oscillating the carriage during the rotation of the supports including means for varying the'throw of the carriage, substantially as and for the purpose described.

3. A bevel gear lapping machine comprising a rotating support for one gear, an oscillating carriage having a rotating support for a second gear, the support being located eccentric to the axis of oscillation of the carriage and the carriage being ar ranged with its axial line intersecting the axis of rotation of the support for first gear, means for rotating one of the supports, and means for oscillating the carriage, substantially as and for the purpose set forth.

4. A bevel gear lapping machine compris. ing a rotating support for a bevel gear, a carriage having a rotating support for a second bevel gear arranged at an angle to the axis of the support for the first gear specified.

to hold the second bevel gear in mesh with the first bevel gear, the'carriage being mova'ble back. and forth to carry the second gear toward and from the first gear during the rotation of the gears for correcting the con- ]u'gate curves-of the gear teeth, the rotating support of one of the gears being adjustable axially, and means for rotating thegears and for simultaneously oscillating the carriage, substantially as and for the purpose described.

a 5. A bevel gear lapping machine comprising a rotating support for one bevel gear,

andan oscillating carriage having a'rotating support for a second bevel gear, the support being arranged with their axes at anangle with each other in position to hold the gearsin mesh, and the carriage being arranged with its axis intersecting the apex of the pitch cones of the gears, eachof the supports for the gears being adjustable axially, substantially as and for the purpose 6. A bevel gear lapping machine compris ing a rotating support for one bevel gear,.

an oscillating carriage having a rotating support for a second bevel gear, arranged radially relatively to the axis ofthe carriage in position to hold the second bevel gear arranged to hold the second gear in' mesh with the first gear, the carriage being movable back and forth to carry the second gear toward and from the first gear for correcting the conjugate curves of the teeth,

means for rotating one of the gears, and means for actuating the carriage including means adjustable to vary the throw of the carriage, substantially as and for the purpose described. p" 8. A 'bevel gear lapping machine comprising a rotating support for one gear, a carriage having a rotating support for a second gear, arranged to hold the second gear in mesh with the first gear, the carriage being movable backand forth to carry the second gear toward and from the first gear for correcting the conjugate, curves of the teeth, means for rotating one of the gears, and means for actuating the carriage including an-eccentric pin, a rock shaft, a part connecting the eccentric pin and the rock shaft and a rock arm mounted on said shaft and con-v nected to the carriage, the eccentric pin being adjustable radially and the rock arm being adjustable to change the angle thereof, substantially as and for the purpose speci- 9. A bevel gear, lapping machine comprising a rotating support for one bevel gear, and an oscillating carriage having a rotating support for a second gear arranged at an angle to the axis of the support for the first gear, the axial line of-the carriage extending crosswise of the axes of the supports, each of the supports being adjustable axially, means for rotating one of the gears, and means for oscillating the carriage including means for adjusting the .throw of the carriage, substantially as and for the purpose set forth.

10. A gear lapping machine comprising a frame, a rotating spindle journaled'in the frame, a gear support mounted on the spindle and adjustable axially thereof, an oscillating carriage pivoted to the frame on an axis intersecting the axis of the rotating support for the first gear, a second carriage mounted on the oscillating carriage, and

movable radially thereof, a rotating spindle carried by the last mentioned carriage and arranged radially relatively to the axis of the oscillating carriage, and having means for supporting a gear in mesh with the former gear, means for rotating one of the rotating spindles, and power transmitting means between the first mentioned rotating spindle and the oscillating carriage, substantially as and for the purpose described.

11. A gear'lapping machine comprising a frame, a rotating spindle journaled in the frame, a gear silpport mounted on the spin-- dle and adjustable axially thereof, an oscillating carriage pivoted to theframe on an axis mtersectlng the axis of the rotating spindle, a second carriage mounted on the oscillating carriage, and movable radially thereof, a rotating spindle carried by the last mentionad carriage and varranged radially relatively to the axis of the oscillating carriage, and having means for supporting a gear in mesh with the gear on the former carriage, means for rotating one of the spindles, and power transmitting means between the first mentioned spindle and the oscillating carriage, substantially purpose specified.

12. A gear lapping machine comprising a rotating support for one gear, a carriage as and for the having a rotating support for a second gear arranged to hold the second gear in mesh with the first gear, the carriage being movable back and forth and arranged tocarry the second geartoward and from the first gear during the actuation of the carriage, means for rotating the support for one gear,- means for actuating the carriage, said means being adjustable to vary the throw of the carriage and including a pivot pin connect-' mg said means and the carriage, a locking bolt for locking the carriage inits starting-I position, means for holding the bolt from" movement when the carriage isout of its starting position, and a coupling between the locking bolt is moved into and out of its locking position, substantially as and for the purpose described.

the pivot pin and the locking bolt whereby 1 when the pivot pin is removed or replaced;'

13. A gear lappingmachine comprising a position, means for holding the bolt from movement when the carriage is out of its starting position, and a lever pivoted between its ends to the carriage and at its ends to the pin and the bolt, substantially as and for the purpose specified.

14. The combination of a stationary part formed with a socket, a movalble carriage, actuating means for the carriage adjustable to vary the movement of the carriage, the carriage having a passage normally in alinement with the socket, a pin for connecting the actuating means to the carriage, and a lever pivoted between itsends to the carriage and at its ends to the pin and the bolt, substantially as and for the purpose set forth. I r

In testimony whereof, we have hereunto signed our names at Syracuse, in the county of Onondaga, in the State of New York, this 20 day of December, 1915.

DONALD D. ORMSBY.

CHARLES H. LOGUE. 

